neither is this an argumentum ad antiquitatem. again all that is being
shown is that xfs has a long history of use again with a reputable
organization. again, it is merely supporting evidence and it is not
being argued that because the organization has used this for x years, it
should necessary continuous to do so because of this fact.

And in fact, for those who did not read further on the NAS website,
Columbia is no longer the prime compute resource at the NASA Advanced
Supercomputing Division at NASA Ames Research Center. C/XFS are no
longer the primary filesystems used by the main compute resource. CXFS
simply can't scale to the client node count and bandwidth of the
Pleiades cluster--it wasn't designed to. Columbia had 20 fat nodes of
512 CPUs each, 20 CXFS clients. Pleiades has 10,752 thin nodes. The
only suitable production filesystem for such a high node count compute
cluster machine is the Lustre cluster filesystem, specifically designed
for large node count clusters.